Æ follis of Constantinople, 715-716, officina G, 3.34g, 23mm, 220º. Overstruck on earlier coin.

Obv.  DNTHEODO SIySMyLA;  Bearded bust facing, wearing loros and crown with cross.

Rev.  Large M; to left, A / N / N / O; to right, I; beneath, G; above, cross; in ex., CON.

DOC 5, MIB 13, Sear 1492 

Courtesy of www.wegm.com, Nov. 2010
(The wegm.com website has a great collection of Byzantine coins)